Computer.



GOMPUTEE.

, APPLIUATION FILED (HIE 12,1908. 925 37259 Sums) 115 2 1.

/ ENITOH G. A. PITKINH COMPUTER.

APPLICATION FILED JUNE 12,1908.

fais mmd J awswo OFFICE.

CARROLL A. PITKIN, OF MoNTPELIEm vERiioN'r.

. c'ciuru'rnn.

Specifieatio n of Letters Patent.

Patented June is, i909.

Application medium 12, nos. 1 Serial ml 4981049.

To all whom it may concern; v

Be it known that I, AnRoLL' A. PITKIN, a citizen of the'United States, and aresident of Montpelier, in the county of Washington and State of Vermont,have invented a new and ImprovedComputer, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in computers, and more particularly to that type of computer in which there are provided two relatively movable members, one of which carries a series'of multi liers and the other of which carries a series o Inulti licands, and for each multiplicarrda series 0 products resulting from the use of each of the several multipliers. E

The object of the invention'is to 'rovide certain improvements in these re atively movable members and in' the mechanisin for operating one of them. My i'mprovedc'omputer may be used for a variety ofdifferent,

systems of ayrne'nt such as daily, biweekly, monthly, etc., and for a variety of different purposes dependent upon the data printed upon the two relatively movable members, but the device is especially 'designed for use 'as a pa 'roll computer.

Reference is to be'fiad to the accompanying drawings, formin apart of this specification, in which simi ar characters of reference indicate corres ending parts in all the figures, and in whic Figure 1 is a top plan view of a device constructed in accordance with my invention; Fi 2 is an end view thereof, aportion'thereof eing broken away;Fig. 3 is a transverse section on the line 33 ofFig. 1, taken in'the direction of the arrow;'Fig. 4 is a side elevation of the device shown on ajsmaller scale and indicating in dotted lines certain of the parts in elevated position; Fig. 5 is a horizontal section on the line 55 of Fig. '4, taken in a direction indicated by the arrow; Fig. 6 is a view of a portion of one'end of the casing; and Fig. 7 is a face view of the chart, portions thereof being broken away. y

In the specific form of my deViceillustrated in the accompanying drawings, I provide a base 10 of wood or any other suitable material, and mounted upon the "base is a casing 11 of sheet metal or the like. Within the casing is mounted a movable chart, a portion of which may be seen through a slot in the wall of the casing, and on the wall adjacent the slot'is a scale or table. of figures, bearing a relationship to those on the chart. As show'n, the chart 12 is formed of two thicknesses, one being of paperupon which the numerals are printed and the other or outer being of celluloid to protect the pa er and prevent the numerals from beingzgworn or erased. The opposite ends are secured to two spools 13 and 14, journaledon'arbors 15 sup orted by the casin or wall 11. Each of t e arbors is provide with a small pinion or gear'wheel 16, adjacent one'end of the spool, and intermediate the two pinions is a large gear wheel 17 intermeshing with both. The gear wheel 17 is of such size in respect to the size of the'pinions16 and thelength of the chart, thatone com lete revolutionlof" thegear wheel 17 trans eis the chart'from one spool to the other, so that the maximum rotation of the gearwheel 17 in one direction is a single revolution. The gear wheel is mounted on ashort shaft 18 carried byone end ofthe casing, and on the outer end of the shaft is a hand wheel 19 and a disk 20, the

purpose of which will be hereinafter set forth.

Intermediate the spools, the up er wall or top of the casing is provided witfi a slot'21 closed upon the inner surface of the casing wall by a strip of glass or other suitable transparent material 22, Beneath the glass strip and adjacent the edges thereof, I provide two rollers or idlers 23, over which the chart passes in going from one spool to the other and which serves to hold the chart closely adjacent the under surface of the glass. The to wall of the casing, adjacent opposite si es of the slot, is provided with two scales 24 and 25, each of which may, if desired, be covered by a thin sheet of celluloid 26, to preserve the numbers against wear and erasure. Movable longitudinally of the slot 21 and adjacent the outer surface of the glass, is a slide 27 having an aperture through which one number on-the chart maybe read and having oppositely-disposed pointed ends 28 directed outwardly toward the scales 24 and 25. The slide may, if desired, be provided with a tongue piece 29, by means of which it maybe readily moved along the slot, a nd is preferably provided with'flanges 30, which engage in grooves adjacent the surface of the glass and hold the slide in place.

in using my improved com uter for determining the amounts due emlp oyees working at different rates and for dii erent'times, the chart may be printed substantially as shown. The chart is subdivided into a plurality of columns 31, extending transversely of the chart, and each column is of a width substantially equal to the width of the slot in the casing. The chart is also divided into a series of rows extending longitudinally of the chart and subdividing each of the columns into sections. In the space 33 at the head of each column is printed a series of numerals indicating the hours which a person might work during a week, as, for instance, from 1 to S0, and extending down each column is the amount due'a person for working the number of hours indicated at the head of the column and at different rates, as, for instance, from ten cents to fifty cents an hour. As shown, the scale 25 at one side of the slot, is subdivided into four columns, one to indicate the rate at which the employee works, the second to indicate the salary for the week in case the em loyee has worked the standard number of 1OUIS, and the remaining two columns indicate the amounts due for fractions of an hour, as, for instance, a half and a quarter. The scale 24 issubstantially identical with the scale 25, save that to facilitate the reading of the numbers, the scale 25 is used for whole numbers and the scale 24 for half numbers. For instance, the scale 25 in the column adjacent the slot would have the rates 10, 11, 12, &c., and the column of the scale 24, adjacent the slot, would have the rates 10%, 11%, 12%, &c.

In using the device, the hand wheel 19 is turned to bring the number of hours which the employee has worked in view through the slot in the casing. The slide is moved down the slot until one of the pointers 28 thereon is directed toward the rate at which the em loyee is paid and through the opening in t 1e slide may then be seen the amount due; as, for instance, if the employee has worked five hours at seventeen cents an hour, the numeral 85 will be visible through the 0 ening in the slide. If the employee has een present the standard or required number of hours, it is not necessary to turn the hand wheel to bring that column of the chart to view, but the scale 24 or 25 will indicate the total weeks wages opposite each rate. For instance, if forty-five hours is considered a weeks work, the amount $4.50 would be presented in the second column adjacent the rate 10 cents of the first column. If the employee has worked -a fraction of an hour, the amount due for that fraction, will be found in the column on the casing, and this amount will be added to the amount due for the whole number of hours at the head of the column. For instance, if an employee has worked five and one-quarter hours at ten cents an hour, the amount 2 cents on the casing in the onequarter column, should be added to the 50 cents on the chart.

To facilitate the turning of the chart to the desired hour column, the disk 20 is provided with a series of numerals about the peri hery thereof, corresponding to the hour col iimns of the chart. As the wheel is moved its maximum distance by one rotation of the hand wheel 19, the disk 20 may be subdivided into the same number of divisions as there are columns on the chart. Each division may be marked, or, as indicated, only each fifth column. The wheel 19 and disk 20 may be rapidly rotated to bring the desired number on the periphery approximately to the desired position, but as the chart travels at a far greater rate than does the eriphery of the wheel, the wheel is used 0 y to adjust the chart to its approximate position and then the exact position is determined by an inspection of the heads of the columns on the chart as the wheel 19 is rotated very slowly.

To facilitate the reading of the numerals and the operating of the device, the eating is preferably pivoted to the base, and so constructed that it may be held at any desired inclination in res ect thereto. The base, as shown particular y in Figs. 4 and 5, is provided with two upwardly-extending lugs 33 at the lower front corners thereof, and is provided with a brace 34 pivoted at the rear end thereof. The undersurface of the casing is provided with a series of stops 35, a ainst any one of which the brace may be he d to suport the casing in an inclined osition. For liolding the casing rigid to the ase, the base may carry short hooks 36 pivoted thereto and adapted to engage with pins on the sides of the casing, as shown in Fig. 4.,

For permitting the removal of the glass 22, to clean the same, it is preferably mounted in suitable guideways and may be removed through the rear end of the casing. For

normally preventing the removal of the glass and holding it'in position, I vide a small plate 37 held in p ace by a couple of screws, one of which may be removed to permit the blade to be swung out of the ath of the longitudinal movement of the glass. To further facilitate the reading of the numerals on the chart, a microscopic lens may be mounted on the slide.

It is evident that the numerals at the heads of the several columns on the chart and the numerals in the rate column on the scale, constitute multiplier and multiplicand, and that the number in the column opposite to a given number on the scale, is the product of said last-mentioned number and the one at the head of the column.

referably prodesired multipliers, multlplicands and products thereon.

Having thus described my invention, I claim as-new anddeslreto secure by Letters Patent: I

- 1. In combination, a casing-having a slot therein, two spools within said casing and disposed uponopposite sides of said s ot a chart having its opposite ends secured to said spools and movab e' bene'ath said slot, a scale on said casing adjacent said slot, and means for rotating said spools simultaneously in the same direction, to bring the chart beneath said slot, said means including a hand wheel, gearin connecting said hand wheel,

and said spoo whereby a single rotation of the hand wheel moves said chart to the limit-' ing extent, and a dial carriedby said hand w eel and exposed to view, said dial traveling at a lower rate of speed than said chart and being subdivided to correspond to the subdlViSlODS on the chart.

2. In combination, two spools, a chart having its opposite ends secured to said spools, a scale adjacentsaid slot, means for rotating said spools simultaneously to bring .difierent portions of the chart adjacent the \scale, said means including a hand wheel, a

gearing connecting said hand wheel and said spools, whereby a single rotation of the hand wheel moves said chart to the limiting extent,

and a dial carried by said hand wheel and,

traveling at a lower rate of speed than said chart and being'marked to correspond to subdivisions on the chart.

In testimony whereof I have signed my V name to this specification in the presence of two subscribing witnesses.

. CARROLL PITKIN.

Witnesses:

FRED B. THOMAS, W. H. BURNHAM. 

